Lab reference

TSH

Thyroid

For education. Check every result.

Anatium is a study resource, not medical advice. Nothing here is a diagnosis, a prescription or a substitute for a clinician who has seen the patient. Check every number against a current local protocol before it touches anyone, and never act on a result you cannot reproduce yourself.

Reference range

Range0.4 to 4 mIU/L

About

The pituitary's instruction to the thyroid, and the first-line thyroid test. It moves in the OPPOSITE direction to thyroid hormone.

When it is low

Hyperthyroidism, secondary hypothyroidism, sick euthyroid, steroids

When it is high

Primary hypothyroidism, recovery from sick euthyroid, TSH-secreting adenoma

The rest of Anatium

Lessons, flashcards, condition modules, the anatomy lab, clinical cases and the AI study assistant are free, and need an account.

Request access